TNETX3100 datasheet(38/80 Pages) TI1

38 / 80 page

TNETX3100

ThunderSWITCH™ 10-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS031D – JUNE 1997 – REVISED OCTOBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

DRAM test-access operation

DIO ADDRESS

DRAM data

0x00D4–0x00D7

DRAM addr

DRAM flag

0x00D8–0x00DB

INIST

PACTST

DIATST

Reserved

0x00DC–0x00DF

The user can write and read a repeating DRAM test by using the following procedure.

• Soft reset the TNETX3150 (do not set the start bit). Perform the following:

DIO write (address 00D3) = 80

DIO write (address 00D3) = 00

• Write to the port 00 TX FIFO block (72 bytes total):

DIO write (address C200) = A5

DIO write (address C201) = A5

DIO write (address C202) = A5

DIO write (address C203) = A5

DIO write (address C204) = A5

DIO write (address C205) = A5

DIO write (address C206) = A5

DIO write (address C207) = A5

DIO write (address C208) = A5

• The FIFO can be filled by writing to the following offset:

DIO write [address C208 + (10 * n)] = A5

where n = 0–7

• Write the DRAM forward pointer, flag,and DRAM address:

DIO write (address 00D4) = FF

;Forward pointer least-significant bit

DIO write (address 00D5) = FF

;Forward pointer

DIO write (address 00D6) = FF

;Forward pointer

DIO write (address 00D7) = FF

;Forward pointer most-significant bit

DIO write (address 00D8) = xF

;Flag

DIO write (address 00D9) = 00

;DRAM address least-significant bit

DIO write (address 00DA) = 00

;DRAM address

DIO write (address 00DB) = 80

;DRAM address most-significant bit

• The DRAM access occurs after the high byte (location 00DB) of the DRAM_address register is

completed. To verify the DRAM access is complete, read the DRAMACT bit within the DRAM flag

DIO read (address 00D8) = 8x

DMA transfer not complete

DIO read (address 00D8) = 0x

DMA transfer complete

TNETX3100 数据表(PDF) 38 Page - Texas Instruments

TNETX3100 数据表(HTML) 38 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

数据表下载